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It’s the right given to high school students, that says that if the don’t want to dance a certain style of dancing, they don’t to do it.
Teacher: you have to do it
Student: but I have flasumo
Teacher: oh, okay then
Flasumo by Anna Millen January 12, 2019
Words you can keep

Flashmob Rave 

A short rave, usually lasting around fifteen minutes. These are often held during finals weeks at universities as a sort of study break.
"I'm so stressed out about finals, I can't wait until the flashmob rave at midnight."
Flashmob Rave by XenonScreams December 14, 2009

Flashmob 

A flashmob is when a large group of people suddenly come together and perform some sort of action, which draws an audience very quickly. After they perform the stunt, the group of people quickly disperse.
Shay Carl, Kassem G, Lisanova, hiimrawn, mysteryguitarman, denisevlogs, and other people came together at the Planet Hollywood Resort and Casino to perform a huge flashmob. It is one of the best flashmobs on YouTube. The video is called "PHAMOUS PLANET HOLLYWOOD FLASH MOB!", uploaded on ShayCarl's channel.
Flashmob by jlt1 November 30, 2009

Flashmob 

A group of arts students with far too much spare time on their hands that collectively pre-arrange to "spontaneously" burst into song or theatrical performance in public spaces to annoy the general public.
I would go apeshit if a flashmob ever erupted in my presence.
Flashmob by cynicroute December 1, 2010

Flashmob Sale

Unsanctioned, crowd-sourced 100% off sales on high-fashion clothing, handbags and accessories at stores such as Nordstrum and Neiman Marcus. Commonly referenced in mainstream media as "Grab-and-run robberies" or "organized retail theft," Flashmob Sales generally involve the redistribution of symbols of capitalist wealth in the order of hundreds of thousands of dollars, taken from icons of retail excess and redistributed to those in need of a fashion upgrade for the holidays.

Rumored to be inspired by the Bob Dylan lyric, "Steal a little and they throw you in jail, steal a lot and the make you king," the proponents of Flashmob Sales are under the apparent belief that if enough people steal a ton of items all at once, the internet will cheer them on and the police will simply go back to finding unarmed civilians to shoot for sport.
"Nice sweater? Is that made from recycled laundry lint?" "Thanks! Yeah, I got it a Flashmob Sale down at the Grove!"
Flashmob Sale by Cultureninja November 25, 2021

Facebook Flashmob 

In a collective effort, facebook friends of one person steal and adopt his/her profile picture, and each tag the original owner in their new pic. Then the group then likes and comments on everyone's new profile pic, ensuring a barrage of notifications for the target person. Works much better if the adopted picture is in any way scandalous.
Last night while Matt was out to dinner with his parents, 10 of us got him with a facebook flashmob. His phone must have buzzed non stop with notifications!
Facebook Flashmob by Mister Snarls August 20, 2011

Flashmorb 

A phenomena seen when a morbhead starts morbing vigorously in public and fellow

like-minded morbheads join them.
Good morbin' Paul! Did you see that flashmorb at Times Square?
Good morbin' to you too Jake! It was a sight to behold.
Flashmorb by Spidey20041 June 3, 2022
More from Urban Dictionary
Acronym, meaning Too Long Didn't Understand
Similar to TLDR
Sister: This meeting was to discuss the rough draft of my essay, where we discussed the subsidiary questions I added in my rough draft. We also discussed the relationship between my main title and the real-life situations I chose to use in my essay. We discussed the structure of my essay as well, specifically the Math AOK section and how it relates to the contradiction of the title. This second meeting was particularly helpful in discussing the implications of my essay claims and how to apply the title across various areas of knowledge. There were many sections of the essay that could have been cut down in wordiness and the ways of knowing required further and more in-depth analysis.

Me: Woah! TLDU!
TLDU by L-Evans January 14, 2019
Word of the Day on August 30, 2026
the act of having anonymous sexual encounters with other men in public toilets.
Cottaging by greeef April 24, 2003
Word of the Day on August 29, 2026

Salad Days 

green inexperienced youthful judgement and cold blooded execution of those judgements.

Rashness with little concern of consequence.

Antony and Cleopatra. William Shakespeare

"My salad days,
When I was green in judgment, cold in blood."

- William Shakespeare, Antony and Cleopatra, 1.5
"How did you end up in jail?"

"Salad days, 'nuf said."
Salad Days by GilbyRFC0 October 7, 2011
Word of the Day on August 28, 2026

age gate 

An absolutely foolproof way to keep minors from viewing content deemed "too mature" for them to watch.
Billy: "So I was trying to watch some videos for an M rated game, and I ran into an age gate, so I put in my real birthday. SOMEHOW it managed to figure out that I am 12. CURSE YOU AGE GATE!!!"

Bill: "Fucking age gate! *quick scroll* THERE! I was born on January 1, 1904. Fuck you age gate."
age gate by Banja January 7, 2011
Word of the Day on August 27, 2026

board chow 

A)
The Crud that collects under the keys in a keyboard. Usually more severe in the keyboards of programmers and webmasters as they tend to spend a lot of time at the the computer and thus eat at their desk. Mainly affecting IBM Model M (clicly) style boards.

B)
Can also be used to gross out Non-Techie people
A)
Bill: want to go to the club?
Bob: No, I've got to clean out my board chow, keys are starting to stick.

B)
Bill: Want to go out to get a bite?
Bob: No, i am just going to have some of my board chow/
Bill: Whats' that?
Bob: The food scraps that collect in my keyboard; Want some?
Bill: *GAG* *HURL* *GAG*
board chow by BinaryHackerMan September 3, 2007
Word of the Day on August 26, 2026

young pup 

a young person, a young adult in their late teens/early 20s.
Ah, you're just a young pup at 23!
young pup by the dog May 30, 2006
Word of the Day on August 25, 2026
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